背景：在开发过程中，iOS8之后，当触发textField时键盘响应，此时如果点击按钮弹出UIAlertView点击取消或者确定时，键盘会收回再次弹出（闪现一次）
在iOS8之后，UIAlertView被弃用，改用UIAlertController，所以在使用过程中需要对系统进行判断，在iOS8之前用UIAlertView，在iOS8之后用UIAlertController，在这里我做了一下封装，直接上代码：
//宏定义 判断手机系统
#define iOS8 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
#define iOS7 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
#define iOS6 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 6.0)
创建自定义的AlertView（我这里就直接用ZGYAlertView）继承NSObject
.h文件中
typedef NS_ENUM(NSInteger){
CANCLEBTN = 0,
ENTERBTN,
}AlertViewBtnIndex;
typedef void(^AlertViewSselectBlock)(AlertViewBtnIndex index);
@interface ZGYAlertView : NSObject@property (nonatomic, copy) AlertViewSselectBlock block;
- (void)showAlertViewMessage:(NSString *)msg Title:(NSString *)title cancleItem:(NSString *)cancle andOtherItem:(NSString *)other viewController:(UIViewController *)controller onBlock:(void (^)(AlertViewBtnIndex))alertViewBlock;
.m文件中代码
@interface ZGYAlertView (){
AlertViewSselectBlock _alertViewBlock;
}
@end
@implementation ZGYAlertView
- (void)showAlertViewMessage:(NSString *)msg Title:(NSString *)title cancleItem:(NSString *)cancle andOtherItem:(NSString *)other viewController:(UIViewController *)controller onBlock:(void (^)(AlertViewBtnIndex))alertViewBlock{
if (iOS8) {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:msg preferredStyle:UIAlertControllerStyleAlert];
if (cancle != nil) {
[alert addAction:[UIAlertAction actionWithTitle:cancle style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
alertViewBlock(CANCLEBTN);
}]];
}
if (other != nil) {
[alert addAction:[UIAlertAction actionWithTitle:other style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
alertViewBlock(ENTERBTN);
}]];
}
[controller presentViewController:alert animated:YES completion:nil];
}else{
UIAlertView *goHomePage = [[UIAlertView alloc]initWithTitle:title message:msg delegate:controller cancelButtonTitle:cancle otherButtonTitles:other, nil];
[goHomePage show];
_alertViewBlock = alertViewBlock;
}
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
_alertViewBlock(buttonIndex);
}
完成之后直接调用即可，采用block回调的方式监听点击取消或者确定的按钮。
第一次写，各位大神勿喷，谢谢！欢迎纠错！
